91-Pa-217
 basic

 element
91-protactinium-217

  • Atomic Mass: 217.0182886 +- 0.0000830 amu
  • Excess Mass: 17035.691 +- 77.286 keV
  • Binding Energy: 1663247.198 +- 77.286 keV
"The 1995 update to the atomic mass evaluation" by G.Audi and A.H.Wapstra, Nuclear Physics A595 vol. 4 p.409-480, December 25, 1995.
  • Half life: 4.9 ms
  • Mode of decay: Alpha to Ac-213
    • Decay energy: 8.490 MeV

    Meta state at 1.854 Mev
  • Half life: 1.6 ms
  • Mode of decay: Alpha to Ac-213
    • Branch ratio: <=100.00 %
    • Decay energy: 0 10.344 MeV
R.R.Kinsey, et al.,The NUDAT/PCNUDAT Program for Nuclear Data,paper submitted to the 9 th International Symposium of Capture-Gamma_raySpectroscopy and Related Topics, Budapest, Hungary, Octover 1996.Data extracted from NUDAT database (Jan. 14/1999)